2003 6.0L. Was driving home the other night and truck started acting funny. Basically it would die when you came to a stop unless you kept your foot on the break and gas. Then it got worse and wouldn't really accelerate. Couldnt tell if it was smoking cause it was dark out. Finally it got to where if you floored it it would make a real deep noise. So I pulled over and shut the truck off. Now about a month ago mechanic told me my FICM was at the lowest voltage within spec. With that said when I pulled over and opened the hood and coolant was coming out of degas bottle so I automatically thought it was the head gasket. I had a new FICM put in last night and had to remove degas bottle to do it. When I laid the bottle down fluid would come out around the cap. Truck was completely cool. So a guy told me it may not be the HG and that it could be the FICM finally went out an that the degas cap may have just been leaking. I haven't started it back up since the new FICM was put it. Mainly cause I'm scared to start it. Any thoughts and input would be great.
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